 .bottom
        {
            position:absolute;
            right:0px;
            bottom:0px;
            background:#000000;
            color:#fff;
            display:block;
            width:100%;
            text-align:center;
            z-index: 10;
        }
        .bottom span
        {
            position:relative;
            display:block;
            left:0;

        }
 <div class="bottom">
            <span class="style4">  </span>
            <span an class="style4">  </span>
            <span class="style4">@陕西喇叭云科技信息技术有限公司</span><br />
            <span class="style4">解释权归喇叭云科技所有  电话：18049539812  </span> <br />
        </div>
